Entanglement

The state of a multi-qubit system can either be a product state or an entangled state. In this video, David Elkouss (QuTech) explains the very puzzling feature of quantum entanglement and how to quantify it. He also tells us about the Bell states and how they form a basis for all two-qubit states.

Prerequisite knowledge

• Multiqubit systems
• Multiqubit gates

Further thinking

Is the following state separable?

Is the following state separable?

Solutions

Further reading

For a simple intuitive explanation, see https://youtu.be/JFozGfxmi8A.
For a detailed explanation of quantum entanglement and its consequences, see https://arxiv.org/abs/1303.2849.